<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/vue-2.4.0.js"></script>
    <link rel="stylesheet" href="./lib/animate.css">
    <!-- 入场 bounceIn    离场 bounceOut -->
</head>

<body>
    <div id="app">
        <input type="button" value="toggle" @click="flag=!flag">
        <!-- 需求： 点击按钮，让 h3 显示，再点击，让 h3 隐藏 -->
        <!-- <transition enter-active-class="animated bounceIn" leave-active-class="animated bounceOut">
      <h3 v-if="flag">这是一个H3</h3>
    </transition> -->

        <!-- 使用 :duration="毫秒值" 来统一设置 入场 和 离场 时候的动画时长 -->
        <!-- <transition enter-active-class="bounceIn" leave-active-class="bounceOut" :duration="200">
      <h3 v-if="flag" class="animated">这是一个H3</h3>
    </transition> -->

        <!-- 使用  :duration="{ enter: 200, leave: 400 }"  来分别设置 入场的时长 和 离场的时长  -->
        <transition enter-active-class="bounceIn" leave-active-class="bounceOut" :duration="{ enter: 200, leave: 400 }">
            <h3 v-if="flag" class="animated">这是一个H3</h3>
        </transition>
    </div>

    <script>
        // 创建 Vue 实例，得到 ViewModel
        var vm = new Vue({
            el: '#app',
            data: {
                flag: false
            },
            methods: {}
        });
    </script>
</body>

</html>